Unless otherwise specifically provided in this title, nothing contained in this title shall be construed to require any construction or work regulated by this title to be altered, changed, reconstructed, removed or demolished if such construction or work was installed prior to April 8, 1976, the effective date of the ordinance set forth in this title, and in accordance with any laws or regulations in effect at the time of its installation, except when any such construction or work regulated by this title is imminently hazardous, unsafe, insanitary or a menace to life, health or property in the judgment of the chief of environmental health. (Ord. 4883-NS § 1 Exhibit A, Ch. 1 Art. 1 § 3, 1976)